Weeks after school shooting, band performs at Carnegie Hall

Three weeks after a gunman killed 17 people at their high school, students from Parkland, Florida, have followed through with a long-planned Carnegie Hall performance.The Marjory Stoneman Douglas High School Wind Symphony played at the renowned New York venue Tuesday during a concert featuring high school bands.The concert was scheduled before the Feb. 14 massacre. Among those killed was freshman Alex Schachter, who played in the marching band that includes the wind symphony and other groups.The